content: /* Copyright (C) 2016-2018 Alibaba Group Holding Limited
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  
  // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf;
  
  import com.google.protobuf.AbstractMessageLite.Builder.LimitedInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.ByteBuffer;
  
  /**
   * A partial implementation of the {@link Parser} interface which implements
   * as many methods of that interface as possible in terms of other methods.
   *
   * Note: This class implements all the convenience methods in the
   * {@link Parser} interface. See {@link Parser} for related javadocs.
   * Subclasses need to implement
   * {@link Parser#parsePartialFrom(CodedInputStream, ExtensionRegistryLite)}
   *
   * @author liujisi@google.com (Pherl Liu)
   */
  public abstract class AbstractParser<MessageType extends MessageLite>
      implements Parser<MessageType> {
    /**
     * Creates an UninitializedMessageException for MessageType.
     */
    private UninitializedMessageException
        newUninitializedMessageException(MessageType message) {
      if (message instanceof AbstractMessageLite) {
        return ((AbstractMessageLite) message).newUninitializedMessageException();
      }
      return new UninitializedMessageException(message);
    }
  
    /**
     * Helper method to check if message is initialized.
     *
     * @throws InvalidProtocolBufferException if it is not initialized.
     * @return The message to check.
     */
    private MessageType checkMessageInitialized(MessageType message)
        throws InvalidProtocolBufferException {
      if (message != null && !message.isInitialized()) {
        throw newUninitializedMessageException(message)
            .asInvalidProtocolBufferException()
            .setUnfinishedMessage(message);
      }
      return message;
    }
  
    private static final ExtensionRegistryLite EMPTY_REGISTRY
        = ExtensionRegistryLite.getEmptyRegistry();
  
    @Override
    public MessageType parsePartialFrom(CodedInputStream input)
        throws InvalidProtocolBufferException {
      return parsePartialFrom(input, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parseFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      return checkMessageInitialized(
          parsePartialFrom(input, extensionRegistry));
    }
  
    @Override
    public MessageType parseFrom(CodedInputStream input) throws InvalidProtocolBufferException {
      return parseFrom(input, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parsePartialFrom(ByteString data, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      MessageType message;
      try {
        CodedInputStream input = data.newCodedInput();
        message = parsePartialFrom(input, extensionRegistry);
        try {
          input.checkLastTagWas(0);
        } catch (InvalidProtocolBufferException e) {
          throw e.setUnfinishedMessage(message);
        }
        return message;
      } catch (InvalidProtocolBufferException e) {
        throw e;
      }
    }
  
    @Override
    public MessageType parsePartialFrom(ByteString data) throws InvalidProtocolBufferException {
      return parsePartialFrom(data, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parseFrom(ByteString data, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      return checkMessageInitialized(parsePartialFrom(data, extensionRegistry));
    }
  
    @Override
    public MessageType parseFrom(ByteString data) throws InvalidProtocolBufferException {
      return parseFrom(data, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parseFrom(ByteBuffer data, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      MessageType message;
      try {
        CodedInputStream input = CodedInputStream.newInstance(data);
        message = parsePartialFrom(input, extensionRegistry);
        try {
          input.checkLastTagWas(0);
        } catch (InvalidProtocolBufferException e) {
          throw e.setUnfinishedMessage(message);
        }
      } catch (InvalidProtocolBufferException e) {
        throw e;
      }
  
      return checkMessageInitialized(message);
    }
  
    @Override
    public MessageType parseFrom(ByteBuffer data) throws InvalidProtocolBufferException {
      return parseFrom(data, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parsePartialFrom(
        byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      try {
        CodedInputStream input = CodedInputStream.newInstance(data, off, len);
        MessageType message = parsePartialFrom(input, extensionRegistry);
        try {
          input.checkLastTagWas(0);
        } catch (InvalidProtocolBufferException e) {
          throw e.setUnfinishedMessage(message);
        }
        return message;
      } catch (InvalidProtocolBufferException e) {
        throw e;
      }
    }
  
    @Override
    public MessageType parsePartialFrom(byte[] data, int off, int len)
        throws InvalidProtocolBufferException {
      return parsePartialFrom(data, off, len, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parsePartialFrom(byte[] data, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      return parsePartialFrom(data, 0, data.length, extensionRegistry);
    }
  
    @Override
    public MessageType parsePartialFrom(byte[] data) throws InvalidProtocolBufferException {
      return parsePartialFrom(data, 0, data.length, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parseFrom(
        byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      return checkMessageInitialized(
          parsePartialFrom(data, off, len, extensionRegistry));
    }
  
    @Override
    public MessageType parseFrom(byte[] data, int off, int len)
        throws InvalidProtocolBufferException {
      return parseFrom(data, off, len, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parseFrom(byte[] data, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      return parseFrom(data, 0, data.length, extensionRegistry);
    }
  
    @Override
    public MessageType parseFrom(byte[] data) throws InvalidProtocolBufferException {
      return parseFrom(data, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parsePartialFrom(InputStream input, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      CodedInputStream codedInput = CodedInputStream.newInstance(input);
      MessageType message = parsePartialFrom(codedInput, extensionRegistry);
      try {
        codedInput.checkLastTagWas(0);
      } catch (InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(message);
      }
      return message;
    }
  
    @Override
    public MessageType parsePartialFrom(InputStream input) throws InvalidProtocolBufferException {
      return parsePartialFrom(input, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parseFrom(InputStream input, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      return checkMessageInitialized(
          parsePartialFrom(input, extensionRegistry));
    }
  
    @Override
    public MessageType parseFrom(InputStream input) throws InvalidProtocolBufferException {
      return parseFrom(input, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parsePartialDelimitedFrom(
        InputStream input, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      int size;
      try {
        int firstByte = input.read();
        if (firstByte == -1) {
          return null;
        }
        size = CodedInputStream.readRawVarint32(firstByte, input);
      } catch (IOException e) {
        throw new InvalidProtocolBufferException(e);
      }
      InputStream limitedInput = new LimitedInputStream(input, size);
      return parsePartialFrom(limitedInput, extensionRegistry);
    }
  
    @Override
    public MessageType parsePartialDelimitedFrom(InputStream input)
        throws InvalidProtocolBufferException {
      return parsePartialDelimitedFrom(input, EMPTY_REGISTRY);
    }
  
    @Override
    public MessageType parseDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry)
        throws InvalidProtocolBufferException {
      return checkMessageInitialized(
          parsePartialDelimitedFrom(input, extensionRegistry));
    }
  
    @Override
    public MessageType parseDelimitedFrom(InputStream input) throws InvalidProtocolBufferException {
      return parseDelimitedFrom(input, EMPTY_REGISTRY);
    }
  }
  